package control;

import utils.SessionData;
import entity.*;
import java.io.IOException;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import javax.persistence.Query;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import utils.ServletUtil;

@WebServlet(name = "Inloggen", urlPatterns = {"/Inloggen"})
public class Inloggen extends HttpServlet {
    
    protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        
        boolean formSuccess = false;
        
        EntityManagerFactory fact = Persistence.createEntityManagerFactory("vh11i_jeePU");
        EntityManager em = fact.createEntityManager();
        
        User user = null;
        
        try {
            if (request.getMethod().equals("POST")) {
                
                Query query = em.createNamedQuery("getUserByCredentials", User.class);
                query.setParameter("email", request.getParameter("email"));
                query.setParameter("password", request.getParameter("password"));
                
                try {
                    user  = (User)query.getSingleResult();
                }
                catch (Exception ex) {
                }

                if (user != null) {
                    SessionData sessionData = ServletUtil.getSessionData(request);
                    sessionData.login(user);
                    formSuccess = true;
                }
            }
        }
        finally {
            em.close();
            fact.close();    
        }
        
        if (formSuccess) {
            if (user.getUserRole().equals(UserRole.CUSTOMER)) {
                response.sendRedirect("customer/MyAccount");
            }
            else if(user.getUserRole().equals(UserRole.BACKEND_USER)) {
                response.sendRedirect("backend/CategoryAdmin");
            }
        }
        else {
            RequestDispatcher dispatcher = request.getServletContext().getRequestDispatcher("/inloggen.jsp");
            dispatcher.forward(request, response);
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP
     * <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP
     * <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
